'Nifi - Get process group identifier inside process group without using Rest API

I need to get my current process group identifier in order to send it to another tool. I know that I can get it from the UI but I don't want to hardcode it. And I don't want to use the Rest API because I want to get the identifier of the process group I'm currently executing. Is there a way ? Like a core attribute which contains this identifier ?

Thanks.

apache-nifi

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'Nifi - Get process group identifier inside process group without using Rest API

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